Pumping-jack.



PATENTBD DEC. 5, 1905.

E. P. HELM. PUMPING JACK.

urmcuzon FILED um. 19. 1905.

UNITED STATES PATENT onnion EUGENE F. HELM, or MONTPELIER, INDIANA.-

PUMPING-JACK} Specification of Letters Patent.

Patented Dec. 5, 1905.

' Applioation filed January-19,1905. Serial No. 241,341.

To alZ tuhom it may concern:

Be it known that I, EUGENE F. HELM, a citizen of the United States, residing at Montpelier, in the county of Blackford and'State' of Indiana, have invented certain new and useful Improvements in Pumping-Jacks, of which the following is a specification. l I

This invention relates to improvements in oil-.Well-pumping apparatus, and comprises, essentially, aspecial form of pumping-jack.

The chief design of the invention is to secure a jack of this type embodying a general simplicity of. structureand having a peculiar desirable arrangement of parts whereby the requisite power is obtained for pumping purposes.

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction of -the means for effecting the result reference is to be had to the following description and accompanying drawings. I p

The preferred embodiment of the invention is shown in the accompanying'drawings, in which. Figure 1 isa perspective view of a pumpingjack embodying the invention, Fig, 2 is a side elevation.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

In the drawings, thenumeral 1 indicates the casing-head of a well, and the jack is mounted upon this head. The jack is of the bell-crank type and consists of a bell-crank lever of peculiar construction, comprising the, lever 2, extending upwardly from a shaft 3, and from the ends of the shaft 3 extend crank-arms, 4,

arranged at the customary angle withreference to the said lever 2. The shaft 3 is mounted in bearings provided in spaced extensions 5, projecting laterally from the casing-head 1,

' and bearing-plates 6 are attached to the upper portions of the extensions 5, cooperating therewith to form a bearing for the shaft aforesaid. The well-tube 7, extends upwardly through the casing-head 1 in the usual manner, and a pump-rod 8 operates therein, being operably connected with the crank-arms 4 for actuation thereby. A vertical guide-frame 9 extendsupwardly from the casing 1, and said frame consists ofspaced uprights 9, connected at their upper ends by a transverse bar 10.

necessary in devices of this class.

The frame 9 is rigidly mounted upon the easing-head and a sliding cross-head 11 is mounted upon the uprights 9 of the frame, said uprights passing through vertical openings in the cross-head aforesaid. The cross-head 11 is adapted for free vertical movement upon the guide-frame 9 and is connected between its ends and preferably at a point between the uprights 9 with the pump-rod 8. Links or barsl2 are connected at the upper ends.

thereof with the cross-head l1, and thelower extremities of these members 12 are attached pivotally to the ends of the crank-arms 4.

The members 12 constitute a pivotal connection between the crank-arms 4 and the cross-head 11, and when the lever- 2 is actuated vertical movement is thus imparted to the cross-head,

effecting the necessary operation of the'pump:

rod 8. The bars 12 have adjustable connection with thearms 4, and for'this purpose said arms 4 are provided with a plurality of openings 13, through'any one of which pivotpins 14, by which the members 12 are attached to the arms,. may be passed in order to afford an adjustable connection to increase or decrease the movement of the cross-head in a manner which will be readily apparent. In other words, by adjustment of the pivots 14 the leverage of the arms 4 may be increased or decreased in an obvious manner.

The surface-rod (not shown) is of course attached to the upper extremity of the lever 2 in the usual manner and connected with any suitable sourceof power for transmitting motion to the lever 2 in order to actuate the several parts of the device. The guide-frame 9 is so mounted that'the pump-rod is not liable to be bent, but--will maintain its proper alined 4 position with referenceto the pump-barrel under all conditions of service, this being Having thus'd'escribed theinvention, what is claimedas new is' 1 r In a pumping-jack, thecombination of a casing-head, a pump-rod, extensions projecting from the casing-head, a shaft mounted .in said extensions, a lever projecting upwardly from said shaft, crank-arms extending from the ends of the shaft in spaced relation and pro- 'vided longitudinally thereof with a plurality of openings, 21. Vertical guide-frame projecting upwardly from the casing-head and embodying spaced uprights, a sliding cross-head provided with openings receiving the spaced uprights of the guide-frame and connected at a In testimony whereof I afiix my signature in poglint intermediate (iits ends with the puigp-rodfi presence of two Witnesses.

an bars connecte at their upper en s wit the ends of the cross-head and at the lower EUGENE HELM' 5 ends with the crank-arms, said bars or links Witnesses:

having adjustable pivotal connection with the D. A. BRYSON,

crank-arms. L. E. MADDOX. 

